Hello ESDA team,
Does S20.20 ESD handling requirements still apply for Wafer fab environments?
A wafer still has active circuitry, which can be susceptible to ESD, but am not sure if that is considered as an ESD sensitive device. We can apply the cleanroom considerations for a fab to minimize the amount of contamination and dirt. But do we still need to do the E-field measurements for insulators and other ESD checks for the equipment in a fab?
Pls correct me if i am wrong, but i think that all charges are equally distributed on a wafer, making it an equipotential surface. Thus, we may not need to have the ESD checks while handling a wafer. Is this true?